Slot machines used to fill casino floors in bulky cabinets over 40 inches tall....

https://fernandosmastercolumns.swiftnestly.com/posts/who-invented-the-first-slot-machine-in-1895

Slot machines used to fill casino floors in bulky cabinets over 40 inches tall. Now they easily fit in the palm of your hand on screens around 6 inches wide. This shift shows how technology has shrunken big machines into portable fun you can play anywhere